Coffee-machine.



U. NELSON.

COFFEE MACHINE.

AIPLIOATION FILED MAY 3, 1907.

1, 1 1 1 ,270, Patented Sept. 22. 1914.

Witnesses In ven tor A ttorneys.

1IIF NORRIS PETERS (10.. PHOTO-LITHO., WASHINGTON. u. c.

" HHICHHLRLES Nansen, oF1sRdaKL N,i-ma -1mm nssie lioiamoslysrnnnen &co., or: YORK, n. Y.; TAICQEARTN'IEERSHIP comroennvor szc vinnn gTERNAU AND A I LION LsrnAssnunenafj Be ,it known that fiIgfaiGnAnnns a subject ofthe King ofSweden, residing in the borough ofiBrooklyn, county of Kings,

3 i and :State of Q-NewjYonk, have invente'd an Improvement in ,Cofl eeelylachines, (CasefDQ) of which the following is'acspe'cification; i

aThis invention vrelates to improvement in machines for maklng infusions of'cofiee, tea' and slmllarbeveragesm The inventlon 1s not limited to such use but may be employed in connection-with such machines for other or analogouspurposes.

The objectsof the? invention are toproduce a device which hasn'o moving parts, which is simple, cheap toconstruct, willfln'ot get'ou't of order, and which may be readilyand thoroughly cleaned. i V J Another obj ect is to produce a device which will begin to joperate' in the inimum of which an infusion may be inducedfwithout I bringing all of the water in the receptacle to Separating the :twofisiajscreen 3*fo'rc'arry ing the pulverized coffee or other material the"following-drawings;inwhich+' Figure 1 is a sectionalviewof afpo'rtion of'a coitee machin'eembodying' mj'r'inVen tionz Fig. 2 is an enlarged iew of the bottom of the percolator Fig. 3 is" side "View of the same; l"

all of the viewsllike parts desig Iiated *by thlesame reference characters.

' carryingout my' invention I provide a receptacle 1 for holdingfthe water before theinfusion is made; and the 'infusion -after ward. 'Above the Memes is ta of which- 5theiinfusion is to be 'made, The

' screen i has a central opening and" supports theiTeceptaeIeQinthe m iddle of the'recess 8 is a chamber 9 of smaller diameter; The chamber 9 is-preferably "made integrally nppii atioafilea a s, 1907., sin-m1 N6. 371,531,

These and other obi'ects will appear a from a aaeoi m t s rise; p ng s mg, 1914a bottom of the receptacle This plate 10 is for the purpose of concentrating the heat dtromgthe lamp or other] sourceof heat and convecting it to the chamber 9; and is also 12, which communicates with the chamber 9, and" extends upward to thejscreen3, a

with plate lopwhich depends from the iii a V to i the PU 'PQ Q f keepingthe bottom of the I receptacle 1 from being directlyactedupon flangebeing formed atits upper end against which the screen rests and is supported. The lower end of thetube 12 makes a tight joint with the uppen end of the chamber 1 Preferably by "being screwed into' it..

"Within. the tube 12 is an inner tube 13, its

lower end being; fla ed outward to make a tight joint witl'rftheinner Walls of the" tube 12 at some distancefromthebottom of the receptacle 1. Tl1e"tube 18 extends through the tube 4: andend's' aboyethe latterl The upper "end of the tube 4 is preferably curved inward; as showm so as to make afclose joint with the walls ,of-the tube 13'. 'The upperendof the tube 12 is best curved the recess' 8r The side walls of this chain! her are erticjal, as show'nfbut the topand .bottom walls are curved. The side walls make a-fclose' fit'fwith the side walls o ftlie "recessi 8,;and the' edgeofthe chamber 14 is: best made withan" overhanging,flange The spacef'between the bottomof the recess 8 and thebOttOm of the chamberd lconstitutes cavity 16. Thispswity l6 communicates with the inside of the receptaelefl by a labyrinthine passage or passages 17 formed in the outer wallof' the air' chamber 14, and-preferably m'ade an 7 incline. Where a plurality of passages used as shown they will be made like a screw-thread On-the-oiiterwallS of the air ichan'i'beri 1 1. These' wpassages .serye as a means at communication between the cavity 16 andreceptacle 1. h I f "Communication between the cavity 16 chamber :9 islniade, by means" of an open ing "or openings 18, formed in that portion of the tube '12 which lies Withirithebhaxhabs ber 16. Outside of the openings 18 may be a flange 19, such flange may depend from" the bottom of the air chamber '14, or it may be carried by the tube 12.

In use the'receptacle' 1' is partially filled with Water or other liquid, and. the globe 2 and screen 3 with pulverized coffee or other material of which the infusion is made. The deflector 5 prevents "the "accidental introduction of the coffee or other I or other suitable means.

material into the central tube 18. Heat is now applied to the plate by a spirit lamp It'will be obvious that theliquid will have previously en teredthe chamber 9 andcavity 16, and;will stand within. the ,tube 13 1 at-theheightof the liquid in the receptacle 1,; or slightly higher, as caused by capillary action. The liquid in the chamber, 9Will be. heated and steam generated,which will force the liquid in the inner tube 13,out through the upper end thereof Theequilibrium of liquid within the central inner tube 13 and receptacle l. will be restored by liquid entering the cavity 16 through the labyrinthine passagel7 and openings 18. Owing to the intricate nature of thep'assage made by the elements 17 and 18, the l-iquid'will not be will besplattered against the walls of the globej2. and will run down such walls.

IF- find in practice that a coffee machine made in accordance with my invention will operate 1n a minimum of timev and W111 continue tooperate equally Well with essence the chamber 9 becomes unduly heated that as with pure water. I also find that when the liquid willlcontinue to be forced up the tube 13'. This I attribute to the sizeof .the cavity 16, madepossible by the large sizeof, the recess 8, togetherwith the air chambers 12 and 13*, which keep the con tents of the receptacle from becoming unduly heated. The number ofthe openings 18 as well as the number of the labyrinthine passages 17 is immaterial. The space between the tubes 13 and 14. constitutes, an air chamber which may serve to prevent the heating of the ground cofiee by the ascending hot liquid in-the tube 13.

The apparatus maybe readily cleaned by first removing the globe, screen and percolat on and then introducing a brushinto the receptacle 1, and chamber 9. The absence of loose parts prevents loss and Wear. v e

i,1 1i,2'$'o The broad feature oftheinvention comprises a? spiral orlabyrinthine passage as iv a means of conimunicationbetween the heating chamber andthe1jreceptacle, is not claimed,hereintbutforms the subject matter of another pending application.

, In accordance with the provisions of the patent statutes, I I have described .the PI'lIlcipleofmyinvention, together with the ap- I p'aratus which I now consider to represent the best embodimenttthereof, but I desire to have it understood Zara lthe; "apparatus shownis merely illustrative and that the in vention can be carried out in other ways.

1 Having now described myiinvention, what I claim as new and desire to secureby Let; ters Patent, is. q t 3 i 3 i .1. The combination the of a coffee inachineythe said ireceptaclehav mg a recess in the-bottom, a heating'chamber communicat ng with vthe recess and an air chamber coveringwthefl-recess, said air,

chamber being so arranged as, to form a cavity, said cavity being separated from the receptacle by the chamber, .ofapercolator communicating with the heating chamber,

the receptacle and heating chamber, such passage eXtendinga-round the air chamber and including the cavity.

vvith'j a recess in the bottom, there being an there being a labyrinthine passagebetween outside heating chamber in communication air chamber'carriedby; said tube, a secondtube within the first and secured-theretoi' at top and. bottom,; whereby a longitudinal air chamberzbetween the tubes is produced,'one

of the tubes being perforated and ezitending below the-:air chambenianda yfiange adja cent. to thejperforationt i f 1'. A coffee machine having ,a receptacle;

a heating? chamber depending Joelow'; and of less diameter than the receptacle, a percolator, communicating with the heating chamher, an air chamber 'carriedby the perco-' lator, there being a cavity formed byjthepair chamber and the bottom vof the receptacle and a passage. in the periphery of thejair chamber affording communication between the receptacle and the cavity.

5. A coffeemaohine having a receptacle,

a heatingichamber depending below and of less diameter than thereceptacle, a pereoflator communicating with, the heating- .chamher, .an air chamberficarried'by the 'perco; lator, there being acavity formed by the air chamber and the ,bottom of thef'receptacle and a passage in the periphery of the air chamber affording communication beand the heating chamber.

tween the receptacle and vthe cavity, and

there being an opening in the percolator allowing communication between the cavity 'v 6. A percolator pot, having a main her in communication therewitln a percolator tube'having an enlargement adjacent to 1 its lower end and comprising a hollow shell closed at top and bottom to insulate the contents of the pot from such smaller chamber, said shell havinga spiral groove formedin its side wall adapted when the percolator.

tube. is seated in the pot, to form withja sidewall of the recess, a tortuouspassage.

7. A percolator pot comprising afmain chamber, a recessin the chamber, a heating chamber, a percolator tube having an enlargement at its lower end comprising a hol- .,low shell, closed. at top and bottom to in- .sulate the contents of the pot from the heating chamber, said shell having a groove 3 'formedinits side wall adapted when the Oopiesot this patent mas be obtained for p ercolator tube is seated in the pot to form with a side wall of the recess a tortuous passage.

8. In a percolator pot, a main chamber, a,

chem-* 1 her, a recess in the chamber, aheating cham recess in the chamber, a heating chamber, a percolator tube havlng an enlargement at its lower end comprising a hollow lnsulating shell closedat top and bottom to form a closure for the heating chamber and to insulate the contents of-the pot from said chamber, said shell having a continuous groove formed in its side wall adapted when the tube is seated within the pot to form with a side wall of the recess atortuous passage.

9. In a percolator pot, a main chamber, a

recess inthe chamber, a heating chamber, a percolator tube having an enlargement at its lower end comprising a hollow insulating shell closedat top and bottom to form a cover for the heating chamber and to insulate the contents of the pot from said heating chamber, said shell having a spiral groove formed in its side wall adapted,

to form with a side wall of said pot a spiral passage. a

This specification signed and witnessed this 26th day of April, 1907.

CHARLES NELSON.

Witnesses:

LEONARD H. DYER, v JOHN'S. LOTSOH.

five cents each, by addressing the Commissioner of Patents,

Washington, I). C.

50' When said shell is seated within the recess, 

